uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/ocaml-modules/ocsipersist/default.nix

@@ -0,0 +1,20 @@
+{ buildDunePackage, ocsipersist-lib
+, ocsipersist-pgsql
+, ocsipersist-sqlite
+}:
+
+buildDunePackage {
+  pname = "ocsipersist";
+  inherit (ocsipersist-lib) src version useDune2;
+
+  buildInputs = [
+    ocsipersist-pgsql
+    ocsipersist-sqlite
+  ];
+
+  propagatedBuildInputs = [ ocsipersist-lib ];
+
+  meta = ocsipersist-lib.meta // {
+    description = "Persistent key/value storage (for Ocsigen) using multiple backends";
+  };
+}